Grounded 2 Rot and Ruin Update: Release Date and What's New

Obsidian Entertainment announced the Rot and Ruin update for Grounded 2 on October 20, 2026, in an official Xbox Wire post titled "100 Reasons to Run in the Rot and Ruin Update." The update adds a new Woodpile area, the return of Termites (plus new O.G.R.R. variants), a community-requested Centipede boss, the Potato Beetle Buggy, base-painting tools, and a Bismuth-based gear-upgrade system. Obsidian's post — which also refers to the content once as "the Fall Update" — says it's coming "this fall," with no exact calendar date confirmed yet, while Grounded 2's full Version 1.0 release remains targeted for 2027.

Video: Obsidian Entertainment · Grounded 2 - Rot and Ruin Update Trailer

What is Grounded 2?

Grounded 2 is Obsidian Entertainment's shrink-you-down survival co-op game, the sequel to 2020's Grounded. Players are shrunk to the size of ants and have to survive, build bases, and craft weapons and armor across a sprawling overgrown park called Brookhollow Park, either solo or with up to three friends. The game entered early access as an Xbox Game Preview title and a Steam Early Access release on July 29, 2025, and is still sold as an Early Access title on Steam for $29.99, with a Founder's Edition bundle and a Grounded Series bundle (which pairs it with the original game) also available. Grounded 2 is co-developed by Obsidian Entertainment and Eidos-Montréal and built on Unreal Engine 5, and reached PlayStation 5 in August 2026 alongside the prior Into the Abyss update, after launching Xbox- and PC-only a year earlier.

What's new in the Grounded 2 Rot and Ruin update

Obsidian frames Rot and Ruin as the next step in Grounded 2's early access roadmap, following earlier content drops like Toxic Tangle and Into the Abyss. In its announcement post, the studio lists five headline additions: a new adventure area called the Woodpile, the return of Termites alongside a new Centipede boss, the Potato Beetle Buggy, a base-painting system built around a tool called the Splotcher, and a Bismuth-powered gear upgrade path anchored by a new crafting station, the Yoking Press. Obsidian also teases "new SCA.B Themes, collectible miniatures, new stations, and more" arriving with the update, without detailing every item yet. SCA.B Themes have been a running cosmetic system in Grounded 2 since launch, letting players change the visual skin of their SCA.B companion drone, so this is likely an expansion of existing cosmetic variety rather than a new mechanic.

The Woodpile: a new corner of Brookhollow Park

The centerpiece new location is the Woodpile, which Obsidian describes as home to "towering structures and winding passages" that have become overrun by "a familiar threat." It sits within the same Brookhollow Park setting that has anchored Grounded 2 since its July 2025 early access launch, extending the existing map rather than introducing an entirely separate biome — consistent with how previous updates such as the Garden (added in Toxic Tangle) and the Skunk Pond (added in Into the Abyss) expanded the park piece by piece rather than launching a standalone zone.

Termites return, and bring new tricks

Termites were part of the original Grounded and have now been confirmed for Grounded 2's Woodpile, including Workers, Soldiers, and the Termite King, plus new O.G.R.R. variants. Obsidian's post is explicit that returning players shouldn't expect the same fights they remember: the studio says to "keep an eye out for new attacks and some particularly strange behavior" as players move deeper into termite territory, signaling reworked AI or move sets rather than a straight asset port from the first game. Obsidian doesn't specify exactly what the new O.G.R.R. variants are beyond the name, so expect more detail once full patch notes land.

Centipede: the new boss Obsidian calls one of its most requested

Obsidian singles out the Centipede as "one of the community's most requested creatures," now arriving as a full boss encounter in the Woodpile. The studio's own copy leans into the insect's unsettling scale, describing it as "a formidable new boss with plenty of legs and even more reasons to run" — but gives no further detail yet on its attack patterns, arena, or loot table, which will presumably surface in patch notes closer to release. It joins a growing list of Grounded 2 early access bosses that already includes AXL the tarantula (added in the Hairy and Scary update) and King Dozer (added in Beat the Heat).

Saddle up: the Potato Beetle Buggy

Buggies — tamed insect mounts players hatch and ride — have become one of Grounded 2's signature systems, following the Ladybug Buggy (added in Toxic Tangle), the Black Soldier Ant Buggy (added in Beat the Heat), and the amphibious Toe Biter (added in Into the Abyss). The Potato Beetle Buggy is the next addition: Obsidian says it is bigger than the Ladybug Buggy and "built for close-range combat," able to fire a spread of projectiles at creatures in front of it and use a Healing Roar ability to support the player mid-fight. Like other Buggies, it can also haul resources and contribute materials toward blueprints while players build around the park, making it as much a mobile pack mule as a combat mount.

Paint the park: base customization gets a Splotcher

Rot and Ruin also adds a purely cosmetic building system: Painting. Players will be able to craft paint and apply it with a new paintball-gun-style tool Obsidian is calling the Splotcher, recoloring walls, floors, roofs, stairs, doors, and other base structures. It's the kind of base-building quality-of-life feature that early access survival games often add once their core combat and progression loops are in place, giving long-term base builders a reason to revisit and personalize older structures rather than only expanding the map outward.

Bismuth and the Yoking Press: a new way to upgrade gear

The other major system in this update is progression-focused. Obsidian describes Bismuth as "a new resource connected to the strange forces of Raw Science beneath the Park," which players gather and refine, then use at a new crafting station called the Yoking Press to push weapons and armor to higher Tiers. That ties gear progression directly into the park's ongoing "Raw Science" mystery thread, which has been a slow-burn narrative hook across Grounded 2's early access updates, and gives players who have already maxed out their current gear a reason to keep grinding once Rot and Ruin lands.

When does Rot and Ruin release, and on which platforms?

Obsidian's Xbox Wire post does not give a specific release date for Rot and Ruin, saying only that the new content — including the still-undetailed SCA.B Themes, miniatures, and new stations — arrives "when Rot and Ruin arrives in Grounded 2 this fall." The same post confirms that Version 1.0 of Grounded 2 is targeted for 2027, meaning Rot and Ruin will land as another early access content update rather than the full launch out of Game Preview and Early Access.

What's already confirmed: Grounded 2, still labeled an Xbox Game Preview title, is "available now" for Xbox Series X|S, Xbox on PC, and Game Pass, and is also available on Steam through Early Access and on PlayStation 5. The PS5 version is not new to this announcement — Obsidian's own site and Wikipedia's release history both show Grounded 2 already reached PlayStation 5 in August 2026, alongside the prior Into the Abyss update, so Rot and Ruin is a content drop for an already cross-platform game rather than a platform-expansion story.

Some community reporting has also pointed to a public test branch for Rot and Ruin on Steam and Xbox ahead of a wider rollout, along with claims of a large PC install-size reduction tied to an engine update, plus extra Abyss-area content such as new diggable chests and heat-emitting geysers. None of that is confirmed in Obsidian's own Xbox Wire post or on the official Grounded 2 site as of publication, so treat those specifics as unverified community reports rather than confirmed patch contents until Obsidian details them directly.

Where Rot and Ruin fits on the Grounded 2 roadmap

Rot and Ruin follows a steady cadence of early access content drops Obsidian has shipped since Grounded 2 launched on July 29, 2025: Hairy and Scary added the tarantula boss AXL in September 2025, Toxic Tangle introduced the Garden area and Ladybug Buggy in January 2026, Beat the Heat added the Sinkhole Anthill and King Dozer boss in April 2026, and Into the Abyss brought underwater gameplay and the Skunk Pond area in August 2026 — the same update that coincided with the game reaching PlayStation 5. Rot and Ruin continues that pattern: a new area, a new boss, a new Buggy, and an expanded crafting/progression loop, with Version 1.0 still penciled in for 2027 rather than this update.

For players weighing whether to jump into Grounded 2 now versus waiting for 1.0, it's worth remembering this is still an early access, co-op-focused survival game in the same genre lane as other squad-based survival and extraction titles; our breakdown of how co-op shooters like Arc Raiders and Helldivers 2 compare covers some of the same "better with friends" calculus that applies to deciding whether to dive into an early access survival game with a squad. And since Grounded 2 is playable through Xbox Game Pass rather than only as a standalone purchase, it's also worth checking our guide to which Game Pass tier actually includes it before buying the game outright on Steam or PlayStation. Console shoppers tracking other newly cross-platform releases may also want our rundown of Hunter's Moon's PS5 release date and platform details for a sense of how other early access and console-exclusive titles have handled similar platform rollouts.

Why this update matters for the early access community

Obsidian built Grounded 2's entire early access period around visible, frequent content drops rather than a single silent build-up to 1.0, and Rot and Ruin is squarely in that tradition — a themed update with a new area, a new boss, a new mount, and a new progression resource, all shipped under one banner roughly every two to three months since launch. For a community that has already cleared the Garden, the Sinkhole Anthill, and the Skunk Pond, the appeal of Rot and Ruin is less about raw content volume and more about closing out loose threads: Termites returning from the original Grounded gives longtime fans a nostalgia hook, while the Centipede boss checks off one of the most-requested creatures from the community wish list Obsidian has been working through update by update.

What to watch next

The biggest open questions are the ones Obsidian hasn't answered yet: an exact Rot and Ruin release date, full patch notes covering the teased SCA.B Themes and new stations, and whether the community-reported public test branch, install-size reduction, and extra Abyss content make it into the final build. Pandromeda will update this story once Obsidian publishes patch notes or a firm release date on Xbox Wire or the official Grounded 2 site.

Written byJonah Reyes

Jonah Reyes leads Pandromeda's gaming coverage: console and handheld hardware, release dates, pricing changes, patch notes and the business moves behind the biggest franchises. He sources every date and price from the platform holders and publishers themselves, and says plainly when something is still only a rumour.

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